45 #define EA_PREAMBLE_SIZE 8 46 #define MADk_TAG MKTAG('M', 'A', 'D', 'k') 47 #define MADm_TAG MKTAG('M', 'A', 'D', 'm') 48 #define MADe_TAG MKTAG('M', 'A', 'D', 'e') 85 static inline void comp(
unsigned char *dst, ptrdiff_t dst_stride,
86 unsigned char *
src, ptrdiff_t src_stride,
int add)
91 dst[j*dst_stride + i] =
av_clip_uint8(src[j*src_stride + i] + add);
96 int j,
int mv_x,
int mv_y,
int add)
102 comp(frame->
data[0] + (mb_y*16 + ((j&2)<<2))*frame->
linesize[0] + mb_x*16 + ((j&1)<<3),
123 frame->
data[0] + (mb_y*16 + ((j&2)<<2))*frame->
linesize[0] + mb_x*16 + ((j&1)<<3),
128 frame->
data[index] + (mb_y*8)*frame->
linesize[index] + mb_x*8,
140 block[0] = (128 +
get_sbits(&s->
gb, 8)) * quant_matrix[0];
154 }
else if (level != 0) {
158 "ac-tex damaged at %d %d\n", s->
mb_x, s->
mb_y);
162 level = (level*quant_matrix[j]) >> 4;
177 "ac-tex damaged at %d %d\n", s->
mb_x, s->
mb_y);
183 level = (level*quant_matrix[j]) >> 4;
187 level = (level*quant_matrix[j]) >> 4;
225 for (j=0; j<6; j++) {
226 if (mv_map & (1<<j)) {
250 void *
data,
int *got_frame,
254 int buf_size = avpkt->
size;
264 chunk_type = bytestream2_get_le32(&gb);
269 bytestream2_get_le16(&gb), 1000, 1<<30);
271 width = bytestream2_get_le16(&gb);
272 height = bytestream2_get_le16(&gb);
282 if (width < 16 || height < 16) {
287 if (avctx->
width != width || avctx->
height != height) {
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
void(* bswap16_buf)(uint16_t *dst, const uint16_t *src, int len)
ptrdiff_t const GLvoid * data
uint16_t quant_matrix[64]
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
av_cold void ff_mpeg12_init_vlcs(void)
static void comp_block(MadContext *t, AVFrame *frame, int mb_x, int mb_y, int j, int mv_x, int mv_y, int add)
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
static av_cold int init(AVCodecContext *avctx)
void(* clear_block)(int16_t *block)
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
static int get_sbits(GetBitContext *s, int n)
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
GLsizei GLboolean const GLfloat * value
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
bitstream reader API header.
void ff_ea_idct_put_c(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
static void calc_quant_matrix(MadContext *s, int qscale)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
#define UPDATE_CACHE(name, gb)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int flags
AV_CODEC_FLAG_*.
const char * name
Name of the codec implementation.
static av_cold int decode_end(AVCodecContext *avctx)
static int decode_block_intra(MadContext *s, int16_t *block)
#define CLOSE_READER(name, gb)
#define GET_RL_VLC(level, run, name, gb, table, bits,max_depth, need_update)
#define SKIP_BITS(name, gb, num)
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
int width
picture width / height.
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define LAST_SKIP_BITS(name, gb, num)
uint8_t idct_permutation[64]
IDCT input permutation.
RL_VLC_ELEM * rl_vlc[32]
decoding only
#define SHOW_UBITS(name, gb, num)
static int decode210(GetBitContext *gb)
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
static void idct_put(MadContext *t, AVFrame *frame, int16_t *block, int mb_x, int mb_y, int j)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
const uint16_t ff_inv_aanscales[64]
main external API structure.
#define OPEN_READER(name, gb)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static int decode_motion(GetBitContext *gb)
static unsigned int get_bits1(GetBitContext *s)
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
const uint16_t ff_mpeg1_default_intra_matrix[256]
const uint8_t ff_zigzag_direct[64]
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
AAN (Arai, Agui and Nakajima) (I)DCT tables.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
#define SHOW_SBITS(name, gb, num)
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
static int decode_mb(MadContext *s, AVFrame *frame, int inter)
static float add(float src0, float src1)
unsigned int bitstream_buf_size
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static av_cold int decode_init(AVCodecContext *avctx)